3.5x10^-2 of salt in one liter of water this is how much 2.64x10^20of liters water

Total liters of salt in liters of water is .

Step-by-step explanation:

If 1 liter of water contains amount of salt,

Then,

liters of water will contain,

should be multiplied by .

Therefore,

Total liters of salt in liters of water is .

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.